Denver (DEN) to Jacksonville (JAX): On-Time Performance
Data through July 2026
When you fly DEN to JAX matters as much as anything else about the booking: the route swung from 95% on-time in November 2025 to just 51% in June 2025. Across the full period the route averages 73% on-time against a national 78%. Morning departures also hold up better than evening ones (82% vs 65%), which matters most in the rough months.
- On-time
- 73%
- arrived <15 min late
- Avg delay
- 16 min
- completed flights
- Cancelled
- 0.2%
- Flights/day
- 2.8
- last 12 months
- Duration
- 3h 19m
- scheduled
- Distance
- 1,446 mi
Best airline from DEN to JAX
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| United Airlinesmost reliable | 77% | 14 min | 0.1% | 1,219 |
| Southwest Airlines | 67% | 19 min | 0.5% | 783 |
Monthly on-time trend
Best time to fly from DEN to JAX
Aim for departures around 9 a.m. (84% on-time); avoid 7 p.m. departures (56%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 73% | 14 min |
| Tuesdaybest | 74% | 19 min |
| Wednesday | 74% | 15 min |
| Thursday | 74% | 14 min |
| Fridaybest | 74% | 18 min |
| Saturday | 71% | 16 min |
| Sunday | 73% | 18 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft41%
- Airline operations31%
- National airspace system25%
- Weather3%
Frequently asked questions
- How often are flights from DEN to JAX delayed?
- 27% of DEN–JAX flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 16 minutes.
- Which airline is most reliable from DEN to JAX?
- United Airlines has the best on-time record on this route at 77%, based on 1,219 flights. 2 airlines flew DEN–JAX frequently enough to compare in this period.
- What is the best time of day to fly from DEN to JAX?
- Departures around 9 a.m. have the best record (84% on-time), while departures around 7 p.m. have the worst (56%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from DEN to JAX?
- The scheduled DEN–JAX flight time averages 3h 19m over 1,446 miles. Actual arrival times vary — flights on this route land 15+ minutes late 27% of the time.
- How often are DEN to JAX flights cancelled?
- 0.2% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from DEN to JAX?
- June 2025 was the roughest month in this dataset, with only 51% of arrivals on time. The best was November 2025 at 95%. If your dates are flexible, that 44-point gap is worth planning around.
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Based on 2,002 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.